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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

Showing 20 results
Netflix logo
Netflix
Medium
Software Engineer Locked

Compute minimum semesters to finish courses

This question evaluates graph theory and scheduling competencies, including dependency resolution, cycle detection in directed graphs, and capacity-co...

Coding & AlgorithmsGraphs
16
0
255 people solved
Feb 4, 2026
DocuSign logo
DocuSign
Medium
Software Engineer

Design a multi-level parking system

Design a multi-level parking system System Design: Multi‑Level Parking System Context Design the backend for a multi‑level parking facility. The syste...

System DesignLow-Level Design (OOP)API Design
17
0
218 people solved
Aug 1, 2025
Fetch Rewards logo
Fetch Rewards
Medium
Data Scientist

Design analysis to validate reported decline

A beverage company claims 'Q2 sales dropped' but gives you only one dataset (the transactions table described above) and 45 minutes. Design the analys...

Analytics & ExperimentationMetric DiagnosticsMetrics & KPIs
15
0
120 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Easy
Software Engineer Locked

Compute Nearest Destination Distances

This question evaluates graph and grid traversal concepts, specifically multi-source shortest-path computation on a grid and handling special-cell con...

Coding & Algorithms
7
0
90 people solved
Apr 11, 2026
Databricks logo
Databricks
Medium
Software Engineer Locked

Design KV store with sliding-window QPS metrics

This question evaluates designing an in-memory key–value store with sliding-window throughput metrics, testing competencies in data structures, concur...

System DesignData Structure Design
25
0
316 people solved
Nov 8, 2025
Affirm logo
Affirm
Easy
Data Scientist

Calculate Profit of 4-Month Loan at 30% APR

Calculate Profit of 4-Month Loan at 30% APR Credit Risk — Short-term Personal Loan Profitability Context You are evaluating the profit on a simple-int...

Analytics & ExperimentationMath & Number Theory
10
0
108 people solved
Aug 4, 2025
Arista logo
Arista
Easy
Software Engineer

Remove Target Values from a Linked List

Given the head of a singly linked list and an integer target, remove every node whose value equals target and return the new head of the list. The tar...

Coding & Algorithms
6
0
76 people solved
Mar 25, 2026
Temporal logo
Temporal
Medium
Software Engineer Locked

Design a One-to-One Chat System

This question evaluates a candidate's ability to design scalable, real-time backend architectures for one-to-one messaging, covering competencies in d...

System DesignReal-Time SystemsMessaging & Event-Driven
8
0
101 people solved
Apr 3, 2026
Reddit logo
Reddit
Hard
Machine Learning Engineer Locked

Design comment ranking

This question evaluates competency in designing large-scale machine learning ranking systems, testing skills such as candidate generation, label and t...

ML System DesignRanking ModelsFeature Engineering
26
0
185 people solved
Mar 2, 2026
Meta logo
Meta
Medium
Data Engineer

Design a scalable dimensional model

Design a Dimensional Model for Transactional Analytics (Concrete Example Included) You are building a star-schema in a cloud data warehouse for near r...

System DesignDimensional ModelingStorage & Sharding
19
0
133 people solved
Sep 6, 2025
Intuit logo
Intuit
Easy
Data Scientist

Design an experiment for pricing page redesign

A product team is redesigning a pricing tier page. Historically the page only offered a monthly plan; the redesign adds an annual plan option. You are...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
15
0
129 people solved
Nov 8, 2025
ByteDance logo
ByteDance
Medium
Data Scientist Locked

Choose Ranking Functions, Customer Value Metrics, and Predictive Models

A machine-learning and analytics fundamentals interview covering SQL ranking functions, defensible high-value-customer definitions, and model selectio...

Machine LearningSQLMetrics & KPIs
7
0
110 people solved
Aug 3, 2026
Airbnb logo
Airbnb
Medium
Software Engineer

Allocate refund across payments

Question Given a list of completed payment transactions (each with payment method, date, and amount) and a refund amount R, write an algorithm that is...

Coding & Algorithms
82
0
321 people solved
Jul 29, 2025
Google logo
Google
Medium
Data Scientist

Reflect on a failed decision and redo it

Behavioral & Leadership (Data Scientist Onsite) Prompt: High-Stakes Decision That Turned Out Wrong Describe one specific decision you owned that mater...

Behavioral & Leadership
11
0
108 people solved
Oct 13, 2025
xAI logo
xAI
Medium
Software Engineer

Minimum Time to Run All Jobs with a Cooldown Between Identical Jobs

You are given a list of jobs to run on a single-core CPU, where each job is represented by an uppercase letter 'A'–'Z' in an array jobs. Jobs of the s...

Coding & Algorithms
4
0
31 people solved
Jul 30, 2025
Adobe logo
Adobe
Hard
Software Engineer

Analyze end-to-end request latency

Question Provide a detailed approach to analyze and improve the end-to-end latency of a web request. The request flows from a browser through a CDN, l...

System DesignObservabilityWeb Performance
19
0
143 people solved
Sep 6, 2025
Medium
Software EngineerNew Grad Locked

Count Grid Paths Without Three Consecutive Moves

Count monotone grid paths that use exact numbers of right and up moves without ever taking three identical moves in a row. Address empty and one-direc...

Coding & Algorithms
3
0
41 people solved
Jul 28, 2026
Stripe logo
Stripe
Easy
Software Engineer

Explain your tech stack choices

Describe Your Primary Tech Stack, Rationale, and Scale Context: In a software-engineering HR screen, briefly summarize your core technology stack and ...

Behavioral & Leadership
8
0
77 people solved
Aug 14, 2025
Amazon logo
Amazon
Hard
Software Engineer

Design a fraud detection system

Design a Real-Time Payment Fraud Detection System Design an ML-powered system that scores each online card-not-present (CNP) payment during authorizat...

ML System DesignAnnotation & Label QualityML Data Pipelines & Feature Stores
21
0
178 people solved
Aug 10, 2025
Capital One logo
Capital One
Easy
Data Scientist

Compute incremental profit, breakeven, and revenue sensitivity

Question You are evaluating whether to add a vegan burger line in Year 1. Use the following assumptions (m = million): - Fixed training cost: $60m/yea...

Statistics & MathBusiness Case Analysis
12
0
109 people solved
Oct 13, 2025
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